Buckle



July l5, 1952 N. L. TANNERsJ 2,602,977

BUCKLE Filed April 22, 1949 Patented `uly 15, 1952 BUCKLE Nils LinusTannersj, Boden, Sweden, assignor to Gsta Wnnstrm, Boden, SwedenApplication April 22, 1949, Serial No. 89,029

In Sweden June 4, 1946 1 Claim.

The present invention relates to a buckle for straps provided with holesand comprising a buckle-frame bent to form a guide for the strap with afront plate, two side plates and two back flanges, a transverse bolt atone end of said buckle-frame for fastening one end of the strap andlocking means cooperating with the holes in the strap.

One object of the invention is to provide a locking device which isintroduced in the holes of the strap automatically by means of springaction. Another object of the invention is to provide a pressure grip onthe locking device within the buckle-frame, which can easily be operatedby a finger in order to release the locking device but is protected frombeing operated inadvertently. A still further object of the invention isto obtain a spring operated buckle of small dimensions and without anyprojecting parts.

The invention will be more clearly understood from the followingdescription and the accompanying drawing, in which:

Fig. 1 is a plan view from'below of one form of the buckle according tothe invention and a portion of the strap fastened thereto.

Fig. 2 is a section on lines II-lI in Figure 1.

Fig. 3 is a similar section with the locking device in a releasedposition.

In the drawing I designates a leather strap provided with a single rowof holes 2, but it is obvious that also more rows may be used. At theone end 3 the leather strap is formed to a iiip 4 of reduced width,which flip is folded over a transverse bolt 5 and secured thereto bymeans of rivets 6. A plate 'I of sheet metal is bent along thelongitudinal edges in such a way that a front plate 8 two side walls 9and two back flanges I0 are formed to guide the strap. The bolt 5 is atrst bent to a U-form, and the shanks are thereafter bent at a rightangle and inserted from within into holes in the flanges I and securedthereto by clinching. The middle portion of the bolt is located outsidethe buckle frame in such a way that the other end II of the strap can beintroduced between the front plate 8 and the bolt 5 with the fixed end 3of the strap. A locking device or tooth plate I3 is tiltingly mounted ona transverse pin I2. The tooth plate may be formed of sheet iron, inwhich transverse chutes are pressed in the extension of each other butfrom different sides in such a way that the pin l2 may be introduced inthe chutes for tiltingly mounting of the tooth plate. The ends of thepin are bent at a right angle and inserted from within into holes in theflanges I0 to which the pin is secured by clinching.

In the portion of the plate I3 located between the pin I2 and the bolt 5is pressed a chute I4, which has an extension bent towards the frontplate and formed to a locking tooth I5 for cooperation with the holes 2in the strap. The tooth I5 is normally pressed towards the front plateby means of a spring I6 made of piano-Wire. The ends of the spring arebent at a right angle and rest against the flanges I0, and the middleportion of the spring is secured to the chute III in any suitable way,i. e. by means of a pin through the plate or by Welding. The tension ofthe spring is so directed that the middle portion of the springendeavours to force the tooth from the position shown in Fig. 3 to theposition according to Fig. 2. The opposite portion of the tooth plateforms a pressure grip, which by a finger can be pressed towards thestrap in order to release the locking tooth I5.

Although only one form of the invention is illustrated in the drawing itis obvious that different modiilcations are possible without departingfrom the scope thereof.

I claim:

A buckle for connecting two end portions of a belt, comprising abuckle-frame bent to form a guide for a strap with a front plate forminga plane front surface of the buckle, two plane side walls and two backflanges, a U-shaped transverse bolt at one end of said buckle-framesecured to the inside of said flanges and extending beyond the ends ofsaid side walls for fastening one end of the belt, a locking tooth platelocated within said buckle-frame and covered by said front plate, atransverse pin fastened to the inside of said anges, for pivotallymounting of said tooth plate, one end of said tooth plate being locatedbetween said bolt and said pin and having at least one tooth benttowards said front plate, a transverse spring acting upon said toothplate 'to introduce said tooth into holes in the free end REFERENCESCITED The following references are oi' record in the file of thispatent:

UNITED STATES PATENTS Number Name Date 181,229 Whitney Aug. 15. 1876556,538 Haney 'Man 17, 1896 845,164 Dally -...1..-- Feb. 26, 1907

